she also suggested either the black key etude or the aeolian harp. im leaning towards the aeolian harp. it's beautiful, and the technique is consistent throughout.
These are both good, but are somewhat overplayed. If you audition a piece that everyone else plays, (and some of them play much better than you) you need to be innovative for it to actually mean anything to the adjudicators.
However, Aeolian harp is sooo beautiful you just cant go wrong with learning it anyway.
You could look at Etude Op. 10 No. 3 - charming melody line and a good chance to show off your phrasing skills.